Mitsubishi Lancer Evolution IX. Manual - part 313

ON-VEHICLE SERVICE

REAR AXLE

27-27

3. If the gear oil level exceeds the standard value, 

add the specified gear oil up to the bottom end of 
the filler plug hole.

Specified gear oil: DIA QUEEN ATF-SP III

4. Fit the filler plug and tighten it to the specified 

torque.

Tightening torque: 49 

± 10 N⋅m

GEAR OIL REPLACEMENT

M1272004600133

DIFFERENTIAL PART

AC310749 AC

Filler plug

Drain plug

1. Remove the drain plug to discharge the gear oil.
2. Fit the drain plug and tighten it to the specified 

torque.

Tightening torque: 49 

± 10 N⋅m

AC102739

Gear oil

Upper
limit

Lower
limit

6 mm

AF

3. Remove the filler plug and add the specified gear 

oil up to the bottom end of the filler plug hole.

Specified gear oil: DIA QUEEN LSD gear oil

Amount to use: 0.55 

± 0.02 L

4. Fit the filler plug and tighten it to the specified 

torque.

Tightening torque: 49 

± 10 N⋅m

TORQUE TRANSFER MECHANISM PART

AC310750 AC

Drain plug

Filler plug

1. Remove the drain plug to discharge the gear oil.
2. Fit the drain plug and tighten it to the specified 

torque.

Tightening torque: 49 

± 10 N⋅m

3. Remove the filler plug.

AC310751AB

Oil suction gun
(General service tool)

4. Using the oil suction gun (general service tool), 

between the body and differential support arm, 
apply the specified gear oil up to the under of the 
filler plug hall.
Amount to use: 0.55 

−  0.6 L

Specified gear oil: DIA QUEEN ATF-SP III

5. Fit the filler plug and tighten it to the specified 

torque.

Tightening torque: 49 

± 10 N⋅m

FLUID LEVEL CHECK

M1272004700022

1. Remove the maintenance lid located in the 

luggage compartment.

2. <Not using M.U.T.-II/III>

If the vehicle has been run, leave it for 90 min. or 
more in an ordinary temperature (10 

− 30°C) to 

allow the accumulator internal pressure to drop.
NOTE: If the ambient temperature is 10

°

C or less, 

allow more time to leave the vehicle to stand idle.

3. <Using M.U.T.-II/III>

ON-VEHICLE SERVICE

REAR AXLE

27-28

CAUTION

Turn the ignition switch to the "LOCK (OFF)" 
position before connecting or disconnecting the 
M.U.T.-II/III.
4. Set M.U.T.-II/III to 16 pin diagnostic connector. 

Turn the ignition switch to the "ON" position, 
operate M.U.T.-II/III to drive (item 03: directional 
valve) forcibly, release the pressure in the 
accumulator.
NOTE: 

.

•

To drive (oil level check mode) forcibly, turn 
the directional valve of the hydraulic unit 20 
turns from side to side, release the differential 
automatically. Drive can also be cleared forci-
bly using the clear key of M.U.T.-II/III.

•

AC310678

If the function has been stopped by fail safe, 
the hydraulic unit cannot be cleared forcibly.

5. Check that the fluid level in the oil reservoir is in 

the range between MAX and MIN.

6. If the fluid level is lower than MIN, add the 

specified fluid.

Specified fluid: DIA QUEEN ATF-SP III

7. Reinstall the maintenance lid.

AYC BLEEDING

M1272004800029

1. Lift up the vehicle.

CAUTION

Turn the ignition switch to the "LOCK (OFF)" 
position before connecting or disconnecting the 
M.U.T.-II/III.

AC100188 AN

Diagnosis connector

2. Set the M.U.T.-II/III to the 16-pin diagnosis 

connector.

3. Turn the ignition switch to the "ON" position.
4. Set the steering wheel in the straight-ahead 

position.

5. Operating the M.U.T.-II/III, drive the hydraulic unit 

(item No.02) forcibly.
NOTE: 

.

•

Drive the bleeding mode forcibly for 5 minutes, 
release the operation automatically. Drive can 
also be cleared forcibly using the Clear key of 
M.U.T.-II/III.

•

AC310754 AB

Vinyl hose

Bleeder
screw

If the function has been stopped by fail safe, 
the hydraulic unit cannot be cleared forcibly.

6. Remove the cap of the left bleeder screw on the 

torque transfer differential and connect a vinyl 
hose.

7. Gradually turn the steering wheel clockwise from 

the straight-ahead position. At this time, loosen 
the left bleeder screw and check that fluid is 
discharged with air.

ON-VEHICLE SERVICE

REAR AXLE

27-29

CAUTION

While the system is being bled of air, add fluid as 
necessary to ensure that it is left in the oil reser-
voir during the entire procedure.
8. After air has been completely discharged, tighten 

bleeder screw and turn the steering wheel in the 
straight-ahead position.

9. Repeat steps 6 and 7 two to three times until no 

air bubbles are recognized in the fluid that comes 
out. Then, tighten the bleeder screw to the 
specified torque.

Tightening torque: 9 

± 1 N⋅m

10.Perform steps 5 through 8 for the right bleeder 

screw. Note, however, that the steering wheel 
should be turned counterclockwise.

11.When removing the hydraulic unit, bleed the fluid 

line in ACD side (Refer to GROUP 22A - 
On-vehicle Service 

P.22A-153

).

CAUTION

If the system is not completely bled of air, the 
hydraulic unit could generate noise, degrading 
pump durability.
12.After the system has been completely bled of air, 

check for the fluid level (Refer to 

P.27-27

).

AYC OPERATION CHECK

M1272004900026

1. Lift up the vehicles.

CAUTION

Turn the ignition switch to the "LOCK (OFF)" 
position before connecting or disconnecting the 
M.U.T.-II/III.

AC100188 AN

Diagnosis connector

2. Set the M.U.T.-II/III to the 16-pin diagnosis 

connector.

3. Start the engine.
4. Set the gear to the 2nd gear or above, operate 

M.U.T.-II/III, and check from the data list (Item 
No.09) that the wheel speed is within 10 km/h to 
20 km/h.

NOTE: 

.

•

Set the steering wheel to the neutral position.

•

When turning the steering wheel, AYC oper-
ates continually (operation sound from the 
torque transfer differential), but it is not system 
fault. In this case, set the steering wheel to the 
neutral position, and perform the following 
operations in order to stop the ACD.

•

Release the clutch.

•

Set the gear to "Neutral".

•

Stop the engine.

5. Operate the M.U.T.-II/III, drive the torque transfer 

differential by the actuator test (item No.06 and 
07) forcibly.
NOTE: 

.

•

Drive the clutch operating mode forcibly for 1 
minute, release the operation automatically. 
Drive can also be cleared forcibly using the 
Clear key of M.U.T.-II/III.

•

If the hydraulic unit function has been stopped 
by fail-safe, the torque transfer differential can-
not be forcibly driven.

6. Operating the M.U.T.-II/III by data list (item No.07 

and 08), check the condition of the wheel speed 
below. 

<Driving actuator test item No.06 forcibly>
The left rear wheel is faster 2 km/h than right rear 
wheel.
<Driving actuator test item No.07 forcibly>
The right rear wheel is faster 2 km/h than left rear 
wheel.

NOTE: If the above are not satisfied, check the oil 
pressure as the system may be faulty.

OIL PRESSURE CHECK

M1272005000037

1. Lift up the vehicles.

CAUTION

Turn the ignition switch to the "LOCK (OFF)" 
position before connecting or disconnecting the 
M.U.T.-II/III.

AC100188 AN

Diagnosis connector

ON-VEHICLE SERVICE

REAR AXLE

27-30

2. Set the M.U.T.-II/III to the 16-pin diagnosis 

connector.

3. Turn the ignition switch to "ON" position.

AC310756 AB

MD998330

MB991705

4. Disconnect the hydraulic unit and the hydraulic 

unit hose assembly, connect the special tool to L 
port, put the lid to R port or connect the hydraulic 
unit hose assembly disconnected from L port to R 
port.

• Hose adaptor (MB991705)

• Oil pressure gauge (MD998330)

5. Operating the M.U.T.-II/III, drive the hydraulic unit 

forcibly (actuator test item No.02).
NOTE: 

.

•

Drive the operation check mode of the clutch 
left side for 1 minute, release the operation 
automatically. Drive can also be cleared forci-
bly using the Clear key of M.U.T.-II/III.

•

If the function has been stopped by fail safe, 
the hydraulic unit cannot be cleared forcibly.

CAUTION

While the oil pressure is checked, add fluid as 
necessary to ensure that it is left in the oil reser-
voir during the entire procedure.
6. Check that the generated oil pressure of the 

hydraulic unit satisfies the standard value.

Standard value: 0.9 

− 1.1 MPa

7. Check the oil pressure of the clutch right side 

following step 4 through 6. Connect the special 
tool to R port, put the lid to L port or hydraulic unit 
hose assembly disconnected from R port to L 
port, use the M.U.T.-II/III to drive actuator test item 
No.07 (operation check mode of clutch right side) 
forcibly.

8. If the measured value exceeds the standard 

value, replace the hydraulic unit.

9. Connect the hydraulic unit and the hydraulic unit 

hose assembly, and connect the torque transfer 
differential and hydraulic unit hose assembly, 
tighten the flare nut in specified torque.

Tightening torque: 21 

± 3 N⋅m

10.Supply the specified fluid up to the MAX level of 

the oil reservoir, and bleed.
Specified fluid: DIA QUEEN ATF-SP III
Amount to use: 1.0 L

WHEEL BEARING AXIAL PLAY CHECK

M1271000900515

1. Remove the caliper assembly, and suspend the 

caliper assembly with a wire and remove the 
brake disc.

AC206092AC

2. Fit the dial gauge as shown in the diagram and 

move the hub in the axial direction to measure the 
play.

Limit: 0.05 mm

3. If the play exceeds the limit, the driveshaft nut 

should be tightened to the specified torque and 
check the axial play again.

Tightening torque: 225 

± 25 N⋅m

4. Replace the rear hub assembly if adjustment 

cannot be made to within the limit.

5. Install the brake disc and caliper assembly, and 

tighten the caliper assembly mounting bolts to the 
specified torque.

Tightening torque: 54 

± 5 N⋅m

HUB BOLT REPLACEMENT

M1271001000195

1. Remove the brake caliper and brake disc.

AC001182

MB990767

AB

MB991618

2. Use the following special tools to remove the hub 

bolts.

• Front hub and end yoke holder (MB990767)

• Hub bolt remover (MB991618)